<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8" />
		<title></title>
		<script src="js/vue.js" type="text/javascript" charset="utf-8"></script>
	</head>
	<body>
		<div id="app">
			<input-com :username='username' @child-input='changeEvent'></input-com>
			<input-com :username='username' @child-input='username=$event'></input-com>
			
			<h3>{{username}}</h3>
		</div>
		<script type="text/javascript">
			Vue.component('input-com',{
				props:['username'],
				template:`<input type="text" @input="$emit('child-input',$event.target.value)" :value="username" />`,
				
			})
			
			let app = new Vue({
				el:"#app",
				data:{
					username:""
				},
				methods:{
					changeEvent:function(data){
						this.username = data
					}
				}
			})
		</script>
	</body>
</html>
